bluflame/intromat/Intromat/Actions/Hierarchy/CreateFileAction.cs

using System;
using DynamicData;
using Intromat.Interfaces;
using Intromat.ViewModels;

namespace Intromat.Actions.Hierarchy
{
    public class CreateFileAction : IUndoItem
    {
        private readonly FileViewModel _file;
        private readonly FolderViewModel _parent;

        public CreateFileAction(MainViewModel mainVm, FileViewModel file, ModuleViewModel module, FolderViewModel parent)
        {
            _file = file;
            _parent = parent;
            File = module;
        }

        public IFile File { get; }

        public void Redo()
        {
            _parent.Files.Add(_file);
            _parent.IsExpanded = true;
            _file.IsSelected = true;
        }

        public void Undo()
        {
            _parent.Files.Remove(_file);
            _parent.IsSelected = true;
        }
    }
}